'Carrington is a theme platform for WordPress from Crowd Favorite.'
Carrington is a new (we think better) way of organizing a WordPress theme, coupled with a core framework engine that provides a bunch of exciting functionality for free, just by creating different named templates.
-- What is Carrington
Purpose Development Framework
Strong features Conditional based file/folder system. The idea behind the framework's folder structure is to allow you to create templates that meet specific conditions. This way you can create smaller acute templates. For instance you could create a unique comment block for a specific user or all logged in users just by adding one new template file ( Framework Overview ).
Carrington comes in a few different flavors, I personally like the trimmed down version Carrington JAM (Just Add Markup). Download
Downsides In my use cases I have had no real trouble using Carrington. A possible downside maybe the requirement to stick to the framework's required code conventions.
As a program developer Carrington may be a little light and only offer a nice way to organize your templates. For designers, Carrington removes the need to dive into PHP and create template conditions. If you are neither programmer nor designer then you will need something like Carrington Build which allows you to create drag and drop layouts. Which I have not tried and is not free.
Licensing and pricing Carrington is free, GPLv2